Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f78f2e75825082acd49f3751a69473d91f8cae23bff0965619e206012f36572d' 
  AND token = '6JNPE+z8qtVDJdnaN7EXattytHrc/u5/zCm4/cYT+V0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}